Grinding and honing tool



Nov. 16, 195 4 s. SPECK 2,694,277

GRINDING AND HONING TOOL Filed March 4, 1953 INVENTOR.

575' v3 S sex United States Patent GRINDING AND HONING TOOL Steve Speck,Hartford, Conn., assignor of one-half to Stanley J. Grudzinski,Wethersfield, Conn.

Application March 4, 1953, Serial No. 340,337

2 Claims. (Cl. 51-1843) This invention relates to a grinding and honingtool and more particularly to a tool of the type which can be adjustedto grind or hone holes of different diameters.

It is an object of this invention to provide a grinding and honing toolwhich is simple in construction, inexpensive to produce and is easilyadjusted to vary the diameter of the tool to extremely close dimensions.

A further object of the invention is the provision of such a tool havinga shank on which different honing and grinding tools may beinterchangeably mounted.

Further objects and advantages of the present invention will be moreclearly understood from the following description and the accompanyingdrawings in which:

Fig. 1 is a sectional end view of my improved tool taken on line 11 ofFig. 2.

Fig. 2 is a side view of said tool partly in central vertical section.

Fig. 3 is an end view of said tool.

Fig. 4 is a sectional end view of a modified form of my invention takenon line 4--4 of Fig. 5.

Fig. 5 is a side view of said modified form, partly in central verticalsection.

Fig. 6 is an end view showing a further modified form of my invention.

Fig. 7 is a side view thereof partly in central vertical section.

As shown in the drawings, a tool embodying my invention may include ashank 5 having a stem portion 6 and a tapered portion 7 which, isadapted to receive different types of grinding or cutting heads.

The grinding head illustrated in Figs. 1 to 3, is in the form of asleeve 8 having a tapered hole 9 therethrough. Said sleeve is slit, asat 10, to permit expansion and contraction thereof to vary its diameter.The exterior of the said sleeve 8 is provided with dove-tailed slots 11which extend longitudinally of the sleeve and are adapted to receivegrinding stones 12 therein as clearly shown in Fig. l. The said stonesare slidable in the slots 11 so as to permit removal and replacementthereof with similar stones when they become worn or when it is desiredto change the diameter of the tool to a dimension which is beyond thelimits of adjustment permitted by the expansion or contraction of thesaid sleeve.

In order to retain the stones 12 against undesired sliding movementwithin the slots 11, my invention further provides end collars 13 and 14which also have tapered holes 15 and 16, respectively, which receive thetapered portion 7 of the shank and each of said collars is slit, as at18, to permit them to expand and contract in the same manner as thesleeve 8.

When it is desired to use my improved tool for a grinding or honingoperation, suitable stones 12 are inserted into the slots 11 of thesleeve 8. The said sleeve is then mounted upon the tapered portion 7 ofthe shank 5 and against the collar 13, which was previously placed onsaid shank, and the collar 14 is pushed over the end of the shank andagainst the end of the sleeve. The tool may be adjusted to vary theexternal diameter thereof by merely sliding the sleeve 8 upwardly ordownwardly upon the shank and this may be done by simply striking theend of either of the collars 13 or 14 so as to slide the entire assemblyinto the desired position. The tool may thus be 2,694,277 Patented Nov.16, 1954 quickly adjusted so as to grind or hone inside diameters ofholes to extremely close tolerances.

When desired, a honing head such as shown in Figs. 4 and 5 may be usedupon the same shank 5. This head is also in the form of a sleeve 19 andis preferably provided with ribs 20 which extend longitudinally of thesleeve and the said sleeve is slit, as at 21, to permit expansion andcontraction thereof in the manner above described. Annular bosses19a19-a are formed at the opposite ends of said sleeve and provideoutwardly extending abutments which may be struck with a hammer or thelike when it is desired to adjust the sleeve on the shank.

The exterior surfaces of the ribs 20 may be coated with a suitableabrasive material 22 which may be applied to the said surfaces in anysuitable manner for providing a honing surface on the tool. The saidhead 19 may be adjusted in the same manner as the sleeve 8 with theexception that the collars 13 and 14 are not needed when the said sleeve19 is used.

It will be noted that in the sleeve shown in Figs. 1 and 4, the grindingor honing surfaces are equally spaced around the sleeve so that the saidtool is rendered self-centering during the operation thereof which willsimplify the use of the tool and provide for a uniform contact betweenthe operating surfaces of the tool and the inner surface of the hole inwhich the tool is used.

A modified form of honing head, as shown in Figs. 6 and 7, may also beused on the same shank. This head consists of a sleeve 23 which has aslit 24 and a continuous circumferential surface 25 that is coated witha layer of suitable abrasive material 26. The said sleeve 23 is alsoprovided with annular bosses 23-a23-a at its opposite ends and isadjustable for varying the external diameter thereof in the same manneras above described.

I claim:

1. A grinding and honing tool including a shank having a taperedportion, a head in the form of a sleeve having a tapered hole to receivesaid tapered portion and a slit to permit expansion and contraction ofthe sleeve upon being moved relatively to said shank, a plurality ofgrinding stones slidably mounted in slots extending longitudinally ofsaid sleeve and a retaining collar mounted upon said shank against eachend of the said sleeve, the said collars overlapping the slots in thesleeve to thereby retain the grinding stones therein and also being slitto permit movement of the collars with the sleeve relatively to theshank.

2. A grinding and honing tool including a shank having a taperedportion, a head in the form of a sleeve having a tapered hole fittingsaid tapered shank and a slit to permit expansion and contraction of thesleeve as it is moved longitudinally upon the shank, the said sleevehaving longitudinally extending slots therein, a plurality of grindingstones mounted in said slot and slidable endwise of the sleeve, and aretaining collar mounted upon the tapered shank adjacent each end of thesleeve and overlapping the end of the slots therein to retain thegrinding stones in said slots, the said collars and head being jointlymovable upon the shank to thereby permit adjustment thereof for varyingthe external diameter of the head.

